Define basicity of an acid and acidity of a base. On the basis of these, explain the classification of acids and bases. Give suitable examples.

Explanation

Actual concentration of `H^(+)` ions or `OH^(-)` ions in an aqueous solution of an acid or base respectively depends upon the number of `H^(+)` ions or `OH^(-)` ions furnished by one molecule of an acid or base respectively on ionisation. This is given by basicity of an acid that number of `H^(+)` ions furnished by on molecule of acid and acidity of a base that is number of `OH^(-)` ions furnished by one molecule of base.